Flask filling apparatus



Feb. 49 i941. W E, NAYLOR l 21,230,432

FLASK FILLING APPARATUS Filed Aug. 2, 1937 4 Sheets-Sheet 1 Fell 4, 1941- w. E. NAYLoR FLSK FILLING' APPARATUS Filed Aug. 2, 1957 4 Sheets-Sheet 2 w. E. NAYLOR y 2,230,432

FLASK `FILLING APPARATUS Feb 4, 1941.

4 Sheets-Sheet 3 Filed Aug. 2, 1937 @Z22/MLM@ Feb. 4, 1941. w. E. NAYLOR 2,230,432

" FLASK FILLING APPARATUS Filed Aug. 2, 1957 4 Sheets-Sheet 4 Patented Feb. 4, 1941 UNITED STATES PATENT OFFICE FLASK FLLING APPARATUS corporation of Illinois Application August 2, 1937, Serial No. 156,861

10 Claims.

The present invention relates generally to apparatus for filling flasks with moulding sand. More particularly the invention relates to that type of apparatus which is designed for use in 5 a foundry and comprises an assembly in the form of a rotary projector and an electric motor for driving the projector and causing it to form wads of ysand and project the latter downwardly into a subjacent flask, a mounting whereby the assembly of projector and motor is suspended or supported so that it is universally movable to a limited extent, and power driven means for moving the assembly over the flask so as to cause it to fill the latter with sand.

One object of the invention is to provide a flask filling apparatus of this type which is generally an improvement upon, and has greater capabilities of use than, previously designed apparatus of the same general character and for the same purpose by reason of the fact that the power driven means for moving the assembly of projector and motor is so designed that it is adapted in connection with a flask filling operation to move the assembly in a certain course or path over the flask Vfor a predetermined length of time and then automatically to move the assembly in a different course for a predetermined length of time in order to effect filling of all portions of the flask without manual manipulation or control.

Another object of the invention is to provide a ask filling apparatus of the type and character under consideration in which the power driven means for moving the assembly comprises a motor actuated mechanism for swinging or moving the assembly in the one course and a second or independent motor actuated mechanism for moving the assembly of projector and motor in the other or diierent course.

Another object of the invention is to provide a flask filling apparatus of the last mentioned character in which each of the motor actuated mechanisms constituting the power driven means for automatically moving the assembly over the flask includes a variable speed reducing unit whereby the speed of movement of the assembly may be controlled ,or adjusted at will.

A further object of the invention is to provide a nask filling apparatus of the type and character heretofore mentioned in which the motor actuated mechanisms are so designed and arranged that they may, if desired, ybe conjointly operated so as to effect a compound movement. of the assembly.

A still further object of the invention is t0 provide a flask filling apparatus which is generally of a novel character.

Other objects of the invention and the various advantages and characteristics of the present flask filling apparatus will be apparent from a consideration of the following detailed description.

The invention consists in the several novel features which are hereinafter set forth and are more particularly defined by claims at the conl clusion hereof.

In the drawings which accompany and form a part of this specification or disclosure and in which like numerals of reference denote corresponding parts throughout the several views:

Figure 1 is a side View of a flask llng apparatus embodying the invention;

Figure 2 is a plan View illustrating in detail the design and arrangement of the motor actuated mechanisms constituting the power driven 0 means for automatically moving the assembly of projector and motor for flask filling purposes;

Figure 3 is a vertical transverse sectional view on the line 3-3 of Figure 1;

Figure 4 is an end view of the frame which forms part of the mounting for supporting the assembly of projector and motor so that it is universally movable to a limited extent;

Figure 5 is a fragmentary perspective of the upstanding member above the assembly of projector and motor and the operating connections between said member and the motor actuated mechanisms, illustrating in detail the manner in which said connections are connected to the member; and

Figures 6 and 7 are diagrammatic views of the motor actuated mechanisms and the electrical control system therefor, illustrating the manner in which the mechanisms operate to move the assembly of projector and motor.

The apparatus which is shown in the drawings constitutes the preferred form of the invention and is adapted primarily for use in a foundry o-r like establishment. It operates, as hereinafter described, to fill a subjacent flask f with moulding sand and comprises as the main parts thereof a supporting structure 8, a wad forming and swinging assembly in the form of a rotary projector 9 and an electric motor I0, a mounting l I for suspending the assembly from the supporting structure so that it is universally movable to a limited extent, and power means I2 for automatically moving the assembly of projector and motor so as to cause the projector in connection with a flask lling operation to fill all portions of the flask f with wads of sand.

The supporting structure 8 consists of a rectangular horizontally extending platform forming frame I3. This frame serves as a support for the mounting II and the assembly moving means I2. It is supported in an elevated position by legs (not shown) and embodies apair of laterally spaced side beams I4, lower crossbeams l5, and upper cross-beams I6 and I1. The side beams I4 are channel shaped in cross-section and are supported in laterally spaced and parallel relation by way of the lower and upper cross-beams. The lower crossbeams I5 are four in number and are arranged in laterally spaced pairs at the ends of the side beams. The upper cross-beams I6 are two in number and extend between the central portions of the side beams. They are channel-shaped in cross-section and are arranged in laterally spaced relation. The upper cross-beams II are two in number and are located at one end of the frame I3. They are spaced laterally apart, as shown in Figures 1 and 2 and like the cross-beams I6 are channel shaped in cross-section.

The projector 9 is of the rotary variety and corresponds in design and operation to that which is shown in and forms the subject matter of a United States Letters Patent No. 2,092,329 granted to Walter F. Piper, September 7, 1937. It operates to form wads of moulding sand and to sling the wads downwards in rapid succession into the flask f and comprises a cylindrical casing I8, a hopper IS at one end of the casing, a blademequipped rotor (not shown) in the casing, and a downwardly extending elongated discharge tube 2|. The hopper I9 serves to deliver sand from an overhead sand supply (not shown) into the casing and the rotor 20 operates during drive of the electric motor I I) to form the sand in the casing into wads and sling the wads downwards through the discharge tube 2I into the flask f. The motor i9 is iixed to and coaxially positioned with respect to the other end of the projector casing I8, that is, the end which is opposite to the hopper i9, and embodies an armature shaft which projects into andis keyed or otherwise xedly secured to the hub of the blade equipped rotor 20 of the projector.

The mounting I I for suspending or supporting the assembly of projector and motor for limited universal movement, is the same in design and construction as that which is shown in and forms the subject matter of an application for United States Letters Patent led by me, January 28, 1937, Serial No. 122,700. It comprises a frame 22 and a yoke 23 and underlies the platform forming frame i3 of the supporting structure 8. The frame 22 is rectangular and is disposed a small distance beneath said frame I3. It surrounds the assembly of projector and motor and consists of a pair of side members 24 and a pair of endv members 25. The side members are positioned in parallel relation with the side beams i4 of the frame I3 and extend alongside of the projector and motor assembly. They are formed of pipes and are held in laterally spaced and parallel relation by way of the endl members 25. The latter are yoke-shaped, as shown in Figure 4, and have upwardly facing semicircular seats 26 at their ends in which the ends of the side members 24 are secured. The mounting frame 22 is suspended at the ends thereof from the frame i3 of the supporting structure 8 by`way of a pair of base plates 21, hangers 28, and a pail' of rubber blocks 29. The base plates underlie the central or arched portions of the yoke-shaped end members 25 and are secured to the lower ends of the hangers 2B. The latter are four in number and are arranged in pairs at the ends of the mounting frame 22. They straddle the end members 25 and are secured to and depend from the lower cross-beams I5 of the frame |73 of the supporting structure. The rubber blocks 2t are disposed between the base plates 21 and the central or arched portions of the yoke-shaped end members 25 and form pivotal connections whereby the frame together with the assembly of projector and motor is permitted vto rock laterally. They are located in substantially the same plane as the common axis of the projector and motor and are suitably secured against displacement with respect to the base plates and said end members. The yoke 23, which together with the frame 22 constitutes the mounting I I, is disposed substantially midway between the yoke-shaped end members 25. The ends of the yoke 23 are pivotally connected to the side members 24 by rubber blocks 30 and a pair of bracket plates 3 I, and the central portion of the yoke is iiat, as shown in Figure 3, and overlies and is welded or otherwise ixedly secured to a plate 32 which is fixed to the top portions of the casings of the projector and motor. The bracket plates 3| are iixedly secured to the central portions of the side members 24 of the frame 22 and support the rubber blocks 39. The latter underlie the ends of the yoke 23 and permit the assembly of projector and motor to tilt up and down about a transverse axis at right angles to the axis about which the frame 22 is free to rock laterally. The blocks 29 and 3G are positioned substantially in the same plane and the two axes substantially intersect one another. By reason of the fact that the assembly of projector and motor can rock laterally and also tilt vertically it is movable universally. The transverse and longitudinal axes for the assembly are so larranged that they intersect one another at substantially the center of mass of the assembly and hence the assembly may be moved in connection with a flask lling operation with a minimum amount of force.

The power means I2 for automatically moving the projector over the flask f in order to cause it to fill all portions of the latter, consists of a motor actuated mechanism 33 and a motor actuated mechanism 34. 'I'hese two mechanisms, as hereinafter described, operate, when successively or alternately operated, to move the assembly of projector and motor in different courses and when concurrently or conjointly operated to eiTec-t a compound movement of the assembly.

The mechanism 33 is located above the frame I3 of the supporting structure 8 and consists of an electric motor 35, a variable speed reducing unit 36, a gear box 31, a driving disk 38, and an arm 39. The motor 35 is fixed to a carriage 40 on a bed structure 4I.` The latter, as shown in Figures l, 2 and 3, is mounted on a plate 42 which extends across and is supported by one of the cross-beams I8 Vand one of the cross-beams I1. The variable speed reducing unit 38 consists of a pair of oppositely facing cone shaped disks 43 and 44, an endless belt 45, and a pulley 46. The disk 43 is mounted on one end of the armature shaft of the electric motor 35 and embodies an elongated hub 41. The latter is splined to the armature shaft so that it is driven by the latter and ls free to move longitudinally to and from the motor 35. Thedisk 44 is positioned in opposed relation. to the disk 43 and is .fixed to the armature shaft. The diskl 43 is urged towards the disk 44 by means of a compression spring 48 which encircles the hub 41 and extends between the disk 43 and a washer on the outer end of the armature shaft. The endless belt 45 extends between the disks 43 and 44 and the pulley 45 and serves to drive the pulley from the disks. One end of the belt encircles the armature shaft of the motor 35 and iits between and engages the conical faces of the two disks and the other end of the belt extends around the pulley 45,. The compression spring 43 because it serves to urge the disk 43 towards the disk 44 causes the side faces of the belt to engage the conical faces of the disks and serves automatically to take up for any wear. The carriage 40 is mounted on the bed structure 4I so that the motor 35 is movable bodily to and from the pulley 46. Sliding movement of the carriage with respect to the bed structure is controlled by means of a screw shaft 49 which extends through an internally threaded socket 5i! on the bed structure and is confined at one end thereof in a bearing (not shown) in the carriage so that it is free to rotate but is held against axial displacement. A hand wheel5I is connected to the screw shaft 49 and permits the latter to be turned. When the hand wheel is rotated in one direction, the carriage 45 together with the motor 35 is moved away from the pulley 45. When the wheel is turned in the reverse direction the carriage together with the ymotor is shifted towards the pulley. When the motor 35, as the result of manipulation of the hand wheel 5I is shifted away from the pulley the end of the belt 45 which enoiroles the armature shaft of the motor forces the disks apart and in a sense contracts itself around the armature shaft. As a result of this so called contraction the pulley 45 is caused to rotate at a relatively lower speed. When the motor 35 is shifted or moved towards the pulley 45 slack is caused to form in the -belt and this slack is taken up as the result of the compression spring 43 forcing the disk 43 to- Wards the disk 44 and thus increasing the diameter of the end portion of the belt which encircles the armature shaft of the motor 35. -By increasing the diameter of such end portion of the belt the ratio of the drive between the two disks and the pulley 46 is increased and the pulley is driven faster or at an increased speed from the disks. By adjusting the moto-r toand from the pulley, any desired speed reduction with a given range may be effected. The gear box 31 of the mechanism 33 is mounted on a plate 52 on the upper cross-beams I1 of the frame of the supporting structure and consists of a housing 53, a horizontally extending shaft 54, a vertically extending shaft 55, and speed reducing gearing (not shown) in the housing and serving to connect the shaft 55 for drive by the shaft 54. The shaft 54 is journaled in bearings in the housing 53 and extends into and is fixed to the hub of the pulley 45. The shaft 55 is journaled in the housing 53 and carries at its upper end the driw'ng disk 33. The arm 33 extends substantially horizontally and is pivotally connected at one end thereof to an upstanding pintle 56 on the outer margin of the disk 38. The other end of the arm is pivotally connected to a rod 51 which extends upwardly from the central portion of the yoke 23 and is fixedly secured to such portion by way of a bracket 53. When the motor 35 of the mechanism 33 is operated` the disk 38 is driven or rotated as a result of drive by the variable speed reducing. unit 36 and the shafts 54 and 55 of the gear box 31. During rotation or drive of the disk 38 the arm 39 is shifted back and forth and through the medium of the upstanding rod 51 tilts the assembly of projector and motor up and down and causes the discharge tube 2| to move in substantially an elliptical course over the flask f. The arm 33 constitutes thefdriving connection between the motor actuated mechanism 33 and the assembly and includes a sleeve-like part 59 whereby the distal end portion thereof, that is, the portion which is connected to the upper end of the rod 51 is free to tilt vertically to a small extent.

The mechanism 34, like the mechanism 33 is located above the frame I3 of the supporting structure 8. It is similar in design and construction to the mechanism 33 and consists of an electric motor 5U, a variable speed reducing unit 6I, a gear box 62, a driving disk 53, and an arm 34. The motor 33 is mounted on a carriage 55 and serves to drive the disk 53 through the medium of the variable speed reducing unit, 6I and the gear box 52. The carriage 65 is slidably mounted on a bed structure 66 and it, together with the motor is controlled as far as sliding movement thereof is concerned by way of a handle equipped screw shaft 61. The bed structure 63 is mounted on a plate 33 on the upper cross-beam I3 of the frame I3. The variable speed reducing unit 6I is similar in construction and design to the unit 45 of the mechanism 33 and consists of a pair of opposed cone shaped disks 63 and 10, an endless belt 1 I, and a pulley 12. The gear box 62 comprises a horizontally extending shaft 13, and a vertically extending shaft 14 and underlies the driving disk 62. The shaft 13 carries and is driven by the pulley 12 and is connected by gearing to drive the vertical shaft 14. The upper end of the shaft 14 is xedly connected to the driving disk 62 and the latter, as shown in Figure 2, embodies an upstanding pintle on its marginal portion. The motor 6d and the speed reducing unit 6I are positioned at right angles to the motor and speed reducing unit of the mechanism 36 and the gear box 62 is located at one side of the frame I3 of the supporting structure, as shown in Figure 2. I'he arm 64 extends substantially at right angles to the arm 39 and is pivotally connected at one end thereof to the pintle 15. The other or distal end of the arm 64 is pivotally connected to the upper end of the upstandng rod 51. When the motor 63 is operated the disk 63 is driven through the medium o f the speed reducing gearing 5I and the gear box 52 and it, in turn, operates by-way of the pintle 15 to move the arm 64 back and forth. When the arm .54 is moved back and forth the assembly of projector and motor is rocked laterally and the discharge tube ZI is caused to travel or move through a substantially elliptical course at substantially right angles to the course in which the tube is moved when the assembly is moved or shifted by the motor actuated mechanism 33. The arm 54 constitutes the operating connection between the mechanism 34 and the assembly and includes a sleeve-like part 16 whereby the outer end portion thereof is permitted to swing vertically Ato a limited extent. When the motor actuated mechanism 33 is operated the assembly of projector and motor, as

hereinbefore described, is moved back and forth in one direction, that is, throughout a certain course, and when the mechanism 34 is in operation the assembly is moved or shifted back and forth in another direction. When the two mechanisms 33 Vand 34 are conjointly operated the arms 39 and 64 effect a compound movement of the assembly. By varying or adjusting the units 36 and 6| any desired type of compound movement of the assembly may be obtained in order to effect complete filling of the flask in connection with a flask filling operation.

In addition to the supporting structure 8, the assembly of projector and motor, the mounting and the means I2 for automatically moving the assembly for flask filling purposes, the apparatus comprises an electrical control system for controlling the motors and 60 for successive or alternate operation and for conjoint movement. This system comprises a two pole double throw switch 11, a pair of normally open spring contact switches 18 and 19, a cam 80 for alternately closing the switches 18 and 19, and an electric motor 8| for driving the cam. The two pole double throw switch 11 comprises a pair of contacts 82 and 83 at one side thereof, a pair of contacts 84 and 85 at the other side thereof, and a pivoted switch element 8B. The latter comvprises a pair of metallic legs 81 and 88 and an insulated crosspiece 89 between the two legs and is adapted when swung in one direction to have the legs 81 and 88 engage the contacts 82 and 83 respectively, and when swung in the other direction to have said legs engage the contacts 84 and 85, respectively. Line conductors 90 and 9| are connected to the legs 81 and 88 respectively and are adapted to have electric current from any suitable source of supply pass therethrough. The switch 18 comprises a pair of contacts 92 and 93 and is adapted to be closed by the cam 80 during drive of the latter by the electric motor 8|. The contact 92 is connected by a conductor 94 to the contact 82 of the switch 11 and the contact 93 of ,the switch 18 is connected by a conductor 95 to one terminal of the electric motor 35. The other terminal of said motor is connected by a conductor 96 to the contact 83. When the switch element 86 is swung so that the legs 81 and 88 are in contact with thecontacts 82 and 83 respectively and the switch 18 is closed, current flows through the conductor 94 and the switch 18, the conductor 93, the motor 35 and the conductor 96. The motor 35 is thus operated and effects actuation of the mechanism 33 which, as hereinbefore described, causes the assembly of projector and motor to tilt or swing up and down. The switch 19 controls the flow of current to the motor 60 of the mechanism 34. It consists of a pair of contacts 91 and 98 and is adapted to be closed by the cam 80. The contact 91 is connected to the conductor 94 by a conductor 99 and the contact 98 is connected by a conductor |00 to one terminal of the motor 60. The other terminal of the motor 60 is connected by a conductor I0| to the conductor 98. When the switch element 86 ,is swung so as to cause the legs 81 and 88 thereof to engage the contacts 82 and 83 respectively and the switch 19 is closed, current flows through the conductors 94 and 99 to the switch 19 and thence through the conductor |09 to the motor 60 and then by way of the conductors |0| and 96 to the contact 83. As the result of the formation of such circuit the motor 68 is caused to operate and effects actuation of the mechanism 34 which, as previously described, serves to rock laterally the assembly of projector and motor. The cam is driven by the electric motor 8| by any suitable type of speed reducing gearing and is adapted during drive thereof successively to close the switches 18 and 19. One terminal of the motor 8| is connected by a conductor |02 to the conductor 99 and the other terminal of said motor is connected by a conductor v|03 to the conductor |0I. When the switch element is closed, as far as the contacts 82 and 83 are concerned, current flows through the conductors 94, 99 and |02 to the motor and thence from the motor through the conductors |03, |0| and 96 to the contact 83. As the result of such flow of current the motor 8| is caused to operate and effects drive of the cam 80. When the cam is driven it operates successively to close the switches 18 and 19, as hereinbefore described, with the result that the motors 35 and 60 are successively or alternately driven. In order to effect conjoint or concurrent drive of the two motors 35 and 36 conductors I 04 and |05 are provided. The conductor |04 extends between and is connected at its ends to the contact 84 of the two pole double throw switch 11 and the terminal of the motor 60 to which the conductor I 00 is attached or connected. The conductor |05 extends between and is connected at its ends to the contact 85 of the double throw switch 11 and the terminal to which the conductor 95 is connected. When the switch element 86 is swung so as to bring the legs 81 and 88 thereof into contact with the contacts 84 and 85, respectively, current flows through the conductor |04, the electric motor 60, the conductor IBI, the conductor 96, the electric motor 35, and the conductor |05. As the result of such flow of current both motors are operated and the mechanisms 33 and 34 of the assembly moving means I2 are caused to effect a compound movement of the assembly. From the foregoing it is manifest that the electrical control system is such that when the pivoted switch element 86 is shifted in one direction, the motors 35 and 60 are caused to operate alternately and when the element is shifted into the other direction into a closed position as far as the contacts 84 and 85 are concerned, the motors are caused conjointly to operate.

The operation of the apparatus is as follows: When it is desired to operate the motors 35 and 60 alternately so that the assembly moving means I2 operates first to cause the assembly to move back and forth in one course and then back and forth in another course, the switch element 86 .is swung so as to bring the legs 81 and 88 thereof into contact with the contacts 82 and 83, respectively. When the element is so swung the electric motor 8| for driving the cam 80 is operated as the result of establishment of the following circuit: line conductor 90; leg 81; contact 82; conductor 94; conductor |02; motor 8| conductor |03; conductor IDI; conductor 96; contact 83; leg 88; and line conductor 9|. As soon as this circuit is established, the cam 80 is driven by the motor 8| and operates successively or alternately to close the switches 18 and 19. When the switch 18 is closed the following circuit is set up through the motor 35: line conductor 90; leg 81; contact 82; conductor 94; switch 18; conductor 95; motor 35; conductor 96; contact 83; leg 88; and line conductor 8|. Upon completion or establishment of this circuit the motor 35 sets in motion the mechanism 33 and the latter operates to tilt up and down the assembly of projector and motor. When the cam 80 during drive thereof by the motor 8| is out of contact with the switch 18, the latter opens and breaks the aforementioned circuit. Upon continued or further rotation of the cam, the switch 19 is closed. Upon closing of this switch the following circuit is established through the motor 60: line conductor 90; leg 81; contact 82; conductor Sli; conductor S9; switch T9; conductor lim; motor 6B; conductor IBI; conductor S6; contact 83; leg 83; and line conductor 9|. Upon completion of this circuit the motor 69 operates and sets in motionthe mechanism 34 which in turn o-perates to rock laterally the assembly of motor and projector. When it is desired to operate the motors 35 and 36 ccnjointly the switch element 86 is swung so as to bring the legs 81 and B thereof into contact with the contacts 84 and 85, respectively. Such swinging of the switch element establishes the following circuit through the two motors: line conductor 9i); leg 8l; contact 84; conductor IM; motor 6D; conductor IGI; conductor 95; motor 35; conductor m5; contact 85; leg 88; and line conductor 9i. When the motors are driven alternately the speed of swing of the assembly may be controlled by varying or adjusting the variable speed reducing units 3G and 6I. When the motors 35 and 60 are driven conjointly or concurrently the compound movement of the assembly may be changed or varied as far as character is concerned by adjusting the aforementioned variable speed reducing units. The motor le is driven at the same time the motors 35 and 5b are operated and causes wads of sand to be projected downwards into the ask f during movement of the assembly. By adjusting or properly controlling the assembly moving means I2, the assembly may be controlled so that it operates without manual manipulation to fill all portions of the flask f.

The herein described flask filling apparatus is comparatively simple as far as construction is concerned and hence may be manufactured at a low and reasonable cost. It is entirely automatic as far as operation is concerned and is adapted primarily for use in filling flasks of uniform design on an endless conveyor which serves to bring the flasks successively into range of the discharge tube 2l of the projector 9.

The invention is not to be understood as restricted to the details set forth, since these may be modified within the scope of the appended claims, without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is:

l. An apparatus of the character described comprising in combination a supporting structure, a motor driven projector for slinging mould forming material into a subjacent flask, a mounting between the projector and the supporting structure for supporting said projector so that it is movable over the flask, and power driven means for moving the projector automatically first in one course over the flask and then in a different course.

2. An apparatus of the character described comprising in combination a supporting structure, a rotary motor driven projector adapted to form mould forming material into wads and sling the latter into a subjacent flask, means between the projector and structure for supporting said f5 for supporting the projector so that it is free to tilt-up and down and rock sidewise, and power operated means whereby the projector is alternately tilted up and down and rocked sidewise.

4. An apparatus of the character described comprising in .combination a supporting structure, a motor driven projector for slinging mould forming material into la subjacent flask, a mounting between .the projector and the supporting structure for supporting said projector so that it is movable `over the flask, and power operated means whereby the projector may be moved automatically either first in one course over the fiask and then in a diierent course, or with a compound movement over the flask.

5. In lan apparatus of the character described, thecombination with a supporting structure, a motor driven projector for slinging mould forming material into a subjacent flask, and a mounting between the projecto-r and the supporting structure for supporting said projector so that it is movable over the flask, of a motor actuated mechanism ladapted during operation thereof to move the projector in one course over the flask and a second motor actuated mechanism adapted when operated to move .the projector in a different course over said flask.

6. In an apparatus of the character described, the combination with a supporting structure, a motor driven projector for slinging mould forming material into a subjacent flask, and a mounting between the projector and the supporting structure for supporting said project-or so that it is movable over the flask, .of a mechanism including a motor and a variable speed reducing unit for automatically moving the projector in one course over the fiask, and a second mechanism including a mot-or and a variable speed reducing unit for moving said projector in a different course over the flask.

7. In an apparatus of the character described, the combination with la supporting structure, a motor driven projector for siinging mould forming material into a subjacent flask, a mounting between the projector and the structure for supporting the lprojector so that it is free to swing universally to a limited extent, and an upstanding upper member projecting above and held in fixed relation with the projector, of motor actuated mechanism applied to the upper end of the member and operating automatically through said member to swing lthe projector in one course over .the flask, and a second motor actuated member applied to the upper end of the member and operating automatically through the member t-o swing the projector in another course over said flask.

8. In an apparatus of the character described, the combination with a supporting structure, a motor driven vprojector for slinging mould forming material into a subjacent flask, a mounting between the projector and the structure for supporting the projector so that it is free to swing universally to a limited extent, and an upstanding upper member projecting above and held in xed relation with the projector, of a mechanism includying a motor, a variable speed reducing unit, and an operating connection between the unit and the upper end of the member for automatically swinging the projector back and forth in one direction over the fiask, and a second mechanism including a motor, a variable speed reducing unit, and an operating connection between the unit and said upper end of the member for swinging the ,projector back and forth in another direction over the flask.

9. In an apparatus of the character described, the Icombination with a supporting structure, a. motor driven projector for slinging mould forming material into a su-bjacent flask, and a mounting between the projector and the supporting structure for supporting said projector so that it is movable over the flask, of mechanism including an electric motor and a speed reducing unit for moving the projector in one course over the flask, mechanism including an electric motor and a speed reducing unit for moving the projector in another course over said ask, and an electrical control system vfor causing the elect-ric motors to operate either alternately or conjointly.

10. In an apparatus of the character described, the combination with a supporting structure, a motor driven projector for slinging moulding materia] into a subjacent flask, a mounting between the projector and the structure for supporting said projector so that it is movable universally to a limited extent, land an upstanding member projecting above and held in fixed relation with respect to the projector, of a mechanism including an electric motor, a speed reducing unit, and an operating connection between the unit and the upper end of the member for swinging the projector back and forth in one cou-rse over the ask, a. second mechanism including an electric motor, a speed reducing unit, and an operating connection between the unit and the upper end `of the member for swinging the projector back and forth in a different course, and an electrical control system for causing the electric motors to operate either alternately or conjointly.

WALTER E. NAYLOR. 

